FWIW, no Kubrick titles are currently listed as forthcoming/pending at Michael's Movie Mayhem.

Yes, but all four of the titles expected are currently listed as "Discontinued" at "Michael's", so a September release date certainly seems plausible.

DavisDVD is reporting today of a rumored date of November 6th for a Clockwork Orange Special Edition (and possibly The Shining and Eyes Wide Shut as well).

I met Jan Harlin (Kubrick's brother in law and exec producer) this weekend and he said the DVDs are still on track. A new box featuring all the films will be released at the end of this year/early next. Some specs he mentioned were the entire collection of concept paintings for 2001 and 0 Lucky Malcolm, his doc on Malcolm McDowell on A Clockwork Orange.

I don't know how Spartacus will work in there though, will Criterion allow their version in a WB box?

This is the film of a good pupil, no more. An admirer of Max Ophuls, Aldrich, and John Huston, Stanley Kubrick is still far from being the bright boy heralded by the excited publicity surrounding this little gangster film which makes even The Asphalt Jungle look like a masterpiece by comparison. Kiss Me Deadly even more so. I shall not mention Ophuls, who would have nothing to do with the matter except that Kubrick claims his influence through irritating movements of the camera resembling those beloved of the director of Le Plaisir. But what on Ophuls corresponds to a certain vision of the world, in Kubrick is mere showing-off.
The enterprise is not without its sympathetic side, however. An independant production, The Killing was shot quickly and on a low budget. Although the story is not particularly original (robbery of the Los Angeles race-track), and the ending very little better (banknotes fluttering away in the wind after a very badly filmed stroke of bad luck, exactly as in The Treasure of the Sierra Madre), one must praise the ingenuity of the adaptation: by systematically dislocating the chronology of events, it maintains one's interest in a plot which otherwise never leaves the beaten track. Once one has commended the newsreel-style camerawork and Sterling Hayden, there is little left to do but wait, not too impatiently, for Kubrick's next feature, Paths of Glory, which has been very highly praised by the American Press.

Also, I found this article that Godard wrote about Kubrick just after The Killing was released. I'm not sure if it's already been posted in the forum or not:

As far as Eyes Wide Shut goes, Warner have said this will be the uncensored original version in a new widescreen transfer.

I do hope they include both the European (119 minutes) and American (144 minutes) versions of The Shining in one edition, as opposed to putting them out in different regions - too many have dismissed the European version as a running-scared-hackjob (by and large, it seems, without having seen it), but it's just as interesting and legitimate as both versions of The Killing of a Chinese Bookie. In many ways, it's a more disturbing, impressionistic film.

Dr. Strangelove

So, instead of the original camera negative on EWS & The Shining, are we to expect matted widescreen transfers this time around ?

Well, Tarrantinto seemed to be a big fan of both The Killing and JLG, so who knows. Personally, I like Kubrick's films, but owning this boxset is almost as embarrasing as owning the Mel Brooks boxset.

Uh, why? Because it isn't 100% complete and might diminish your cinephile cred with whoever might happen upon your collection of DVDs?

I still love Kubrick, but his fans really aren't serious cinephiles.